The Habit Burger Grill is adding a limited-edition jalapeño char burger. The burger features a chargrilled patty topped with American cheese, a spicy jalapeño jam, the California-based chain’s jalapeño mustard ranch, lettuce, tomato and pickled jalapeños, all served on a toasted brioche bun.

White Castle is adding its 1921 slider with a spicy twist. The slider features ghost pepper cheese, topped with caramelized grilled onions, lettuce and two pickles.

Freddy’s expanded its menu with new additions, including a steakburger stacker and Reese’s-themed desserts.

The steakburger stacker features three steakburger patties, American and white cheddar cheese, lettuce, tomato pickles and Freddy’s fry sauce. Two desserts also are joining the menu with the Reese’s creamy peanut butter shake and the Reese’s crunchy peanut butter concrete, which both feature churned vanilla frozen custard, Reese’s Peanut Butter cups, and Reese’s peanut butter sauce, topped with whipped cream.

Taco Bell is bringing back its nacho fries for a limited time. The nacho fries are available in the classic version, and the company is adding a spicy version of the fan-favorite through a partnership with Austin, Texas-based Yellowbird Hot Sauce. The partnership’s fries feature slim-cut potato fries, nacho cheese sauce, steak and Taco Bell and Yellowbird’s new spicy habanero ranch.

“We're honored to be collaborating with the innovative team at Taco Bell to bring our signature blend of bold flavor and heat to their menu with Yellowbird nacho fries,” said George Milton, chief executive of Yellowbird. “This partnership is a testament to both the growing popularity of Yellowbird and Taco Bell's commitment to taking risks and offering unique and exciting menu items for their customers. We can't wait for everyone to experience the delicious, spicy taste of Yellowbird in this exciting new form.”

McDonald’s has reformulated its Big Mac sandwich, McDouble burger, classic cheeseburger, double cheeseburger and hamburger. The changes include a softer bun, meltier cheese, adding white onions to burger patties while they’re still on the grill and more Big Mac sauce on the burger.

“I'll always remember my first burger from McDonald's,” said Chef Chad Schafer, senior director of culinary innovation at McDonald's USA. “And now my culinary team and I have the best job in the world: thinking about ways to bring even more of that iconic McDonald's taste to fans. We found that small changes, like tweaking our process to get hotter, meltier cheese and adjusting our grill settings for a better sear, added up to a big difference in making our burgers more flavorful than ever.”